EP0215507B1 - Process for producing polyethylene articles having a high tensile strength and modulus - Google Patents

Process for producing polyethylene articles having a high tensile strength and modulus Download PDF

Info

Publication number
EP0215507B1
EP0215507B1 EP86201434A EP86201434A EP0215507B1 EP 0215507 B1 EP0215507 B1 EP 0215507B1 EP 86201434 A EP86201434 A EP 86201434A EP 86201434 A EP86201434 A EP 86201434A EP 0215507 B1 EP0215507 B1 EP 0215507B1
Authority
EP
European Patent Office
Prior art keywords
polyethylene
process according
melting point
article
irradiated
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP86201434A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0215507A1 (en
Inventor
Cornelis Wilhelmus Maria Bastiaansen
Pieter Jan Lemstra
Lambert Henry Theodoor Van Unen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koninklijke DSM NV
Original Assignee
Stamicarbon BV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Stamicarbon BV filed Critical Stamicarbon BV
Priority to AT86201434T priority Critical patent/ATE47814T1/de
Publication of EP0215507A1 publication Critical patent/EP0215507A1/en
Application granted granted Critical
Publication of EP0215507B1 publication Critical patent/EP0215507B1/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J3/00—Processes of treating or compounding macromolecular substances
    • C08J3/28—Treatment by wave energy or particle radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C69/00—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B13/00—Conditioning or physical treatment of the material to be shaped
    • B29B13/08—Conditioning or physical treatment of the material to be shaped by using wave energy or particle radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B9/00—Making granules
    • B29B9/16—Auxiliary treatment of granules
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
    • B29C55/005—Shaping by stretching, e.g. drawing through a die; Apparatus therefor characterised by the choice of materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
    • B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
    • B29C55/04—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique
    • B29C55/06—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique parallel with the direction of feed
    • B29C55/065—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique parallel with the direction of feed in several stretching steps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
    • B29C67/24—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 characterised by the choice of material
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/18—Manufacture of films or sheets
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/06—Polyethene
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/02—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D01F6/04—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds from polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
    • B29C35/0866—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using particle radiation
    • B29C2035/0877—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using particle radiation using electron radiation, e.g. beta-rays
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/04—Polymers of ethylene
    • B29K2023/06—PE, i.e. polyethylene
    • B29K2023/0658—PE, i.e. polyethylene characterised by its molecular weight
    • B29K2023/0683—UHMWPE, i.e. ultra high molecular weight polyethylene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2323/04—Homopolymers or copolymers of ethene
    • C08J2323/06—Polyethene

Definitions

  • the invention relates to a process for producing stretched polyethylene articles with a high tensile strength and a high modulus on the basis of a solid, particle-shaped, linear polyethylene whereby the particles are irradiated, the irradiated particles are transformed above their melting point into articles and the transformed articles are cooled to below their melting point.
  • the present invention now provides a process for producing polyethylene articles such as filaments, fibres, tapes having a higher modulus and a higher strength.
  • the invention therefore relates to a process for producing stretched polyethylene articles with a high strength and a high modulus on the basis of a solid, particle-shaped, linear polyethylene, whereby the particles are irradiated, the irradiated particles are transformed above their melting point into arti- des and the transformed articles are cooled to below the melting point, the process being characterized in that the polyethylene has an average molecular weight of at least 4 x 10 5 , in that the polyethylene has a lamellar structure, in that the polyethylene has a low degree of entanglement and in that the cooled article is subsequently stretched in a plurality of steps at a rising temperature between 90 and 155 ° C but below the melting point of the polyethylene article to be stretched.
  • a linear polyethylene having a weight-average molecular weight of at least 4 x 105, particularly of at least 5 x 105 and preferably of at least 8 x 105.
  • Linear polyethylene is understood to mean in this connection polyethylene capable of containing minor amounts, preferably 5 moles % at most, of one or more other alkenes copolymerized therewith, such as propylene, butylene, pentene, hexene, 4-methylpentene, octene, etc., with at least 100 unbranched carbon atoms and preferably at least 300 unbranched carbon atoms between carbon atoms provided with side chains with more than 1 C-atoms.
  • alkenes copolymerized therewith such as propylene, butylene, pentene, hexene, 4-methylpentene, octene, etc.
  • the polyethylene may contain minor amounts, preferably 25 % (wt) at most, of one or more other polymers, particularly an alkene-1-polymer, such as polypropylene, polybutylene or a copolymer of propylene with a minor amount of ethylene.
  • an alkene-1-polymer such as polypropylene, polybutylene or a copolymer of propylene with a minor amount of ethylene.
  • the polyethylene must further have a lamellar structure and a low degree of entanglement ('disentanglement').
  • a polyethylene can be obtained in various ways known per se, for instance by crystallization from dilute polyethylene solutions, by spinning dilute solutions followed by cutting of the filaments, by extruding dilute solutions and granulating the extrudate.
  • Another possibility is polymerization (in suspension) under such conditions that immediately disentangled and lamellar polyethylene is formed, see for instance 'Ziegler-Natta Catalysts and Polymerizations', by Boor, J. 1979, Academic Press Inc., page 202.
  • the polyethylene is subjected to irradiation according to the invention in a solid form, for instance as powder or granulate.
  • the source of radiation applied may in the first place be an electron beam donor, but in principle a gamma ray source can also be used.
  • a survey of the customary radiation sources and radiation methods is given in Rubber Chemistry and Technology 55 (1982), pages 575-668.
  • the chosen dosage is generally between 1-20 MRAD, particularly 1-10 MRAD, preferably 2-6 MRAD.
  • the transformation of the irradiated polyethylene into an article can be done in various ways, for instance by spinning via a spinning head with a round or slit-shaped die, or by extrusion via an extruder usually with a profile head.
  • the chosen temperature must be higher than the melting temperature of the polyethylene, generally higher than 135 ° C.
  • this chosen temperature is lower than 155 ° C.
  • plasticizers generally to a maximum of 100 % (wt), and preferably 5-40 % (wt), calculated on the polyethylene.
  • plasticizer various agents may be used, inter alia aliphatic hydrocarbons, such as paraffins or paraffinic waxes, aromatic hydrocarbons, such as xylene, or hydroaromatic hydrocarbons, such as decalin or tetralin. Preference is given to using relatively volatile plasticizers, such as decalin.
  • the chosen transformation temperature is above the melting point of the mixture, but of course below the decomposition temperature of the polyethylene.
  • the article obtained in the transformation is subsequently cooled to below the melting temperature, for instance to 60-120 ° C, and successively stretched.
  • the stretching is done at elevated temperature, generally above 75 ° C, and particularly above 90 ° C.
  • the stretching takes place in a plurality of steps at rising temperature, but below the melting point of the polyethylene article to be stretched, which melting point increases to a maximum of about 155 ° C while the molecular orientation increases, so while the degree of stretching increases.
  • Stretching takes place in a plurality of steps, the temperature in the first step being between 90 and 125 ° C and in the final step between 140 and 155 ° C.
  • any residual plasticizer can be removed as known in the art, for instance by extraction.
  • the products according to the invention are suitable for many applications.
  • Filaments and tapes can be used, for instance, as reinforcement in many articles that are known to be reinforced with fibres or filaments, and for all uses in which a low weight combined with a high strength is desirable, such as for instance rope, nets, filter cloths, fabrics, magnetic tapes.
  • the films according to the invention are suitable for many applications. They can be cut into strong ribbons, bands, tapes. They can be used as reinforcement in many materials that are known to be reinforced with films or tapes and for all applications in which a low weight combined with a high strength is desirable, such as for instance audiovisual or magnetic tapes, tapes for medical uses, pakcaging film, protective sheeting, substrates for adhesives, insulating films in condensers, etc.
  • the powder thus obtained was irradiated under a vacuum using an electron accelerator of the HVE type with a voltage of 3 MV, the total dosage being about 5 MRAD, subsequently pressed at about 150 ° C through a die with a width of 10 mm and a thickness of 2 mm to form a tapeshaped article.
  • the tape was cooled to about 120°C and successively stretched in three steps at 120 ° C, 140 ° C and 150 ° C with a total draw ratio of respectively 15, 20 and 30.
  • the resulting tape had a modulus of about 60 GPa and a strength of about 1.8 GPa.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • General Chemical & Material Sciences (AREA)
  • Textile Engineering (AREA)
  • Materials Engineering (AREA)
  • Toxicology (AREA)
  • Artificial Filaments (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)
  • Treatments Of Macromolecular Shaped Articles (AREA)
  • Organic Insulating Materials (AREA)
EP86201434A 1985-08-21 1986-08-18 Process for producing polyethylene articles having a high tensile strength and modulus Expired EP0215507B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86201434T ATE47814T1 (de) 1985-08-21 1986-08-18 Verfahren zum herstellen von polyethylengegenstaenden mit hoher zugfestigkeit und hohem zugmodul.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8502298A NL8502298A (nl) 1985-08-21 1985-08-21 Werkwijze voor het vervaardigen van polyethyleenvoorwerpen met hoge treksterkte en modulus.
NL8502298 1985-08-21

Publications (2)

Publication Number Publication Date
EP0215507A1 EP0215507A1 (en) 1987-03-25
EP0215507B1 true EP0215507B1 (en) 1989-11-08

Family

ID=19846445

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86201434A Expired EP0215507B1 (en) 1985-08-21 1986-08-18 Process for producing polyethylene articles having a high tensile strength and modulus

Country Status (13)

Country Link
US (1) US4888141A (enrdf_load_stackoverflow)
EP (1) EP0215507B1 (enrdf_load_stackoverflow)
JP (1) JPS6248527A (enrdf_load_stackoverflow)
KR (1) KR900004839B1 (enrdf_load_stackoverflow)
AT (1) ATE47814T1 (enrdf_load_stackoverflow)
AU (1) AU585053B2 (enrdf_load_stackoverflow)
BR (1) BR8603956A (enrdf_load_stackoverflow)
CA (1) CA1275637C (enrdf_load_stackoverflow)
DE (1) DE3666787D1 (enrdf_load_stackoverflow)
ES (1) ES2001236A6 (enrdf_load_stackoverflow)
IN (1) IN167813B (enrdf_load_stackoverflow)
NL (1) NL8502298A (enrdf_load_stackoverflow)
ZA (1) ZA866253B (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9441766B2 (en) 2009-06-02 2016-09-13 Bhp Billiton Petroleum Pty Ltd. Reinforced hose

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8701219A (nl) * 1987-05-22 1988-12-16 Stamicarbon Werkwijze voor het bereiden van een ultra-verstrekbaar polymeer materiaal, ultra-verstrekbaar polymeermateriaal, alsmede werkwijze voor het vervaardigen van voorwerpen.
NL8801426A (nl) * 1988-06-03 1990-01-02 Stamicarbon Werkwijze en inrichting voor het vervaardigen van eindloze voorwerpen uit kunststof.
US5047446A (en) * 1988-07-22 1991-09-10 Himont Incorporated Thermal treatment of irradiated propylene polymer material
NL9001745A (nl) * 1990-08-01 1992-03-02 Stamicarbon Oplossing van ultra-hoog moleculair polyetheen.
NL9001847A (nl) * 1990-08-21 1992-03-16 Stamicarbon Prothese uit polyetheen gevuld met een anorganische vulstof.
US5514822A (en) * 1991-12-13 1996-05-07 Symetrix Corporation Precursors and processes for making metal oxides
CA2127746A1 (en) * 1993-07-09 1995-01-10 Dedo Suwanda Continuous process for manufacturing crosslinked, oriented polyethylene products
US8865788B2 (en) 1996-02-13 2014-10-21 The General Hospital Corporation Radiation and melt treated ultra high molecular weight polyethylene prosthetic devices
US8563623B2 (en) 1996-02-13 2013-10-22 The General Hospital Corporation Radiation melt treated ultra high molecular weight polyethylene prosthetic devices
US5749214A (en) * 1996-10-04 1998-05-12 Cook; Roger B. Braided or twisted line
US6121413A (en) * 1999-04-30 2000-09-19 Burstein; Albert H. Heat treatment of ultra high molecular weight polyethylene
BR0111629B1 (pt) 2000-06-12 2010-12-28 mangueira e método para fabricar mangueira.
WO2003031140A1 (en) * 2001-10-12 2003-04-17 Stichting Dutch Polymer Institute Process to sinter ultra high molecular weight polyethylene
EP1308255A1 (en) * 2001-10-30 2003-05-07 Dsm N.V. Process for the manufacturing of a shaped part of ultra high molecular weight polyethylene and a fibre made with this process
US7550555B2 (en) * 2002-01-29 2009-06-23 Smith & Nephew Orthopaedics Ag Sintering ultrahigh molecular weight polyethylene
BRPI0408095B1 (pt) 2003-03-05 2017-09-26 Bhp Billiton Petroleum Pty Limited. Hose end connection
US7344672B2 (en) * 2004-10-07 2008-03-18 Biomet Manufacturing Corp. Solid state deformation processing of crosslinked high molecular weight polymeric materials
AU2007246827B2 (en) 2006-05-08 2013-06-27 Dunlop Oil and Marine Ltd. Improvements relating to hose
EA014571B1 (ru) 2006-05-08 2010-12-30 БиЭйчПи БИЛЛИТОН ПЕТРОЛЕУМ ПТИ ЛТД. Усовершенствованный шланг, способ и аппарат для изготовления усовершенствованного шланга
GB0609079D0 (en) * 2006-05-08 2006-06-21 Bhp Billiton Petroleum Pty Ltd Improvements relating to hose
GB0612991D0 (en) 2006-06-29 2006-08-09 Bhp Billiton Petroleum Pty Ltd Improvements relating to hose
GB0616053D0 (en) 2006-08-11 2006-09-20 Bhp Billiton Petroleum Pty Ltd Improvements relating to hose
GB0616052D0 (en) 2006-08-11 2006-09-20 Bhp Billiton Petroleum Pty Ltd Improvements relating to hose
EP2460636A1 (en) * 2006-10-30 2012-06-06 Smith & Nephew Orthopaedics AG Processes comprising crosslinking polyethylene or using crosslinked polyethylene
MY153807A (en) 2007-09-14 2015-03-31 Bhp Billiton Petroleum Pty Ltd Improvements relating to pipe
US10655042B2 (en) * 2015-11-13 2020-05-19 Schlumberger Norge As Wellbore strengthening additive and uses thereof

Family Cites Families (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3563870A (en) * 1969-01-23 1971-02-16 Dow Chemical Co Melt strength and melt extensibility of irradiated linear polyethylene
JPS526314B2 (enrdf_load_stackoverflow) * 1971-11-01 1977-02-21
US3887319A (en) * 1972-12-08 1975-06-03 Polymer Corp Apparatus for the extrusion of ultra high molecular weight polymeric resins
GB1568964A (en) * 1975-11-05 1980-06-11 Nat Res Dev Oriented polymer materials
GB1603638A (en) * 1978-05-31 1981-11-25 Bowman J Polymer processing
NL177759B (nl) * 1979-06-27 1985-06-17 Stamicarbon Werkwijze ter vervaardiging van een polyetheendraad, en de aldus verkregen polyetheendraad.
CA1142883A (en) * 1980-09-04 1983-03-15 George White Process for irradiation of polyethylene
US4348350A (en) * 1980-09-26 1982-09-07 Michigan Molecular Institute Ultra-drawing crystalline polymers under high pressure
NL8006994A (nl) * 1980-12-23 1982-07-16 Stamicarbon Filamenten met grote treksterkte en modulus en werkwijze ter vervaardiging daarvan.
AU549453B2 (en) * 1981-04-30 1986-01-30 Allied Corporation High tenacity, high modulus, cyrstalline thermoplastic fibres
NL8104728A (nl) * 1981-10-17 1983-05-16 Stamicarbon Werkwijze voor het vervaardigen van polyetheen filamenten met grote treksterkte.
JPS58217322A (ja) * 1982-06-12 1983-12-17 Somar Corp 超高分子量ポリエチレンマット製品
EP0115192B2 (en) * 1982-12-28 1992-07-22 Mitsui Petrochemical Industries, Ltd. Process for producing stretched filaments of ultrahigh-molecular-weight polyethylene
JPS59216912A (ja) * 1983-05-20 1984-12-07 Toyobo Co Ltd 高強度・高弾性率ポリエチレン繊維の製造方法
KR870001129B1 (ko) * 1983-08-15 1987-06-09 도오요오 보오세끼 가부시끼가이샤 고강력, 고 모듈러스(modulus) 섬유 또는 필름 및 그 제조방법
JPS59216914A (ja) * 1983-10-22 1984-12-07 Toyobo Co Ltd 超高強力ポリエチレン繊維の製造方法
JPS59216913A (ja) * 1983-10-22 1984-12-07 Toyobo Co Ltd 高強度・高弾性率ポリエチレン繊維
JPS60101032A (ja) * 1983-11-08 1985-06-05 Toyobo Co Ltd 高強力高弾性率結晶性重合体延伸物の製造方法
GB8333032D0 (en) * 1983-12-10 1984-01-18 Bp Chem Int Ltd Orientated polyolefins
JPS60132744A (ja) * 1983-12-21 1985-07-15 Nitto Electric Ind Co Ltd 架橋された超高分子量ポリエチレンフイルムの製造法
JPS60228122A (ja) * 1984-04-27 1985-11-13 Toa Nenryo Kogyo Kk ポリエチレン極薄フイルムの製造方法
US4600631A (en) * 1984-05-01 1986-07-15 Massachusetts Institute Of Technology Ultra tough plastic material
JPS60236716A (ja) * 1984-05-10 1985-11-25 Mitsubishi Monsanto Chem Co 超高分子量ポリエチレンフイルム又はシ−トの製造方法
JPH0678379B2 (ja) * 1984-08-30 1994-10-05 三井石油化学工業株式会社 超高分子量結晶性ポリエチレン変性物及びその製造方法
US4655769A (en) * 1984-10-24 1987-04-07 Zachariades Anagnostis E Ultra-high-molecular-weight polyethylene products including vascular prosthesis devices and methods relating thereto and employing pseudo-gel states
DE4128570A1 (de) * 1991-08-28 1993-03-04 Pluss Stauffer Ag Carbonat-haltige mineralische fuellstoffe und pigmente
JPH0659172A (ja) * 1992-08-05 1994-03-04 Ricoh Co Ltd 対物レンズ、および対物レンズの傾き調整方法、および対物レンズ製造装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9441766B2 (en) 2009-06-02 2016-09-13 Bhp Billiton Petroleum Pty Ltd. Reinforced hose

Also Published As

Publication number Publication date
IN167813B (enrdf_load_stackoverflow) 1990-12-22
DE3666787D1 (en) 1989-12-14
BR8603956A (pt) 1987-03-24
AU6158786A (en) 1987-02-26
ATE47814T1 (de) 1989-11-15
US4888141A (en) 1989-12-19
ES2001236A6 (es) 1988-05-01
CA1275637C (en) 1990-10-30
EP0215507A1 (en) 1987-03-25
AU585053B2 (en) 1989-06-08
NL8502298A (nl) 1987-03-16
ZA866253B (en) 1987-03-25
KR900004839B1 (ko) 1990-07-08
JPS6248527A (ja) 1987-03-03
KR870001927A (ko) 1987-03-28

Similar Documents

Publication Publication Date Title
EP0215507B1 (en) Process for producing polyethylene articles having a high tensile strength and modulus
DE69513736T2 (de) Gut verarbeitbare polymerzusammensetzungen aus lldpe
CA2040226C (en) Method for increasing molecular weight of syndiotactic polypropylene
US5428079A (en) Solution of ultra-high molecular weight polyethylene
EP0048227B1 (en) Stretched thermoplastic material based on polyethylene and a process for its production
EP0135253B1 (en) Process for producing an ultrahigh-molecular-weight polyethylene composition
JP3386150B2 (ja) 高溶融強度のエチレンポリマー、その製造法、及びその用途
EP0192303B1 (en) Process for prepapring polyolefin gel articles, as well as for preparing herefrom articles having a high tensile strength and modulus
EP0401942B1 (en) Whitened wire of ultra-high-molecular-weight polyethylene and production thereof
Krassig Fiber technology: from film to fiber
US6689436B2 (en) LLDPE-based thermoshrinkable films
JP2836156B2 (ja) 延伸ポリエチレンフィルムの製造方法
WO1992003494A1 (en) Process for producing articles from ethylene polymer with an intrinsic viscosity of at least 4 dl/g
US3640921A (en) Filamentary polyolefin foam product and process of making the same
JP2537306B2 (ja) ポリプロピレン系発泡シ―トの製造方法
JPS5962643A (ja) 合成樹脂架橋発泡体
KR20070019661A (ko) 고 테너시티 및 인성을 갖는 메탈로센 폴리프로필렌 필름
JPH0419931B2 (enrdf_load_stackoverflow)

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE FR GB IT LI NL SE

17P Request for examination filed

Effective date: 19870811

17Q First examination report despatched

Effective date: 19880511

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE FR GB IT LI NL SE

REF Corresponds to:

Ref document number: 47814

Country of ref document: AT

Date of ref document: 19891115

Kind code of ref document: T

REF Corresponds to:

Ref document number: 3666787

Country of ref document: DE

Date of ref document: 19891214

ITF It: translation for a ep patent filed
ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19920713

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19920715

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19920721

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19920730

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19920812

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19920828

Year of fee payment: 7

ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19920831

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19921030

Year of fee payment: 7

REG Reference to a national code

Ref country code: CH

Ref legal event code: PUE

Owner name: DSM N.V.

NLS Nl: assignments of ep-patents

Owner name: DSM N.V. TE HEERLEN.

ITPR It: changes in ownership of a european patent

Owner name: CESSIONE;DSM N.V.

REG Reference to a national code

Ref country code: GB

Ref legal event code: 732E

REG Reference to a national code

Ref country code: FR

Ref legal event code: TP

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19930818

Ref country code: AT

Effective date: 19930818

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19930819

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19930831

Ref country code: CH

Effective date: 19930831

Ref country code: BE

Effective date: 19930831

BERE Be: lapsed

Owner name: DSM N.V.

Effective date: 19930831

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19940301

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19930818

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19940429

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19940503

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

EUG Se: european patent has lapsed

Ref document number: 86201434.7

Effective date: 19940310

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050818